B4J Tutorials

This is not a B4J tutorial but since it can be used also with B4J to print documents I post it here. Read the following link:

How to Make a Raspberry Pi-Powered Print Server

Make your wired printer wireless with a Raspberry Pi

www.tomshardware.com

...

 

The next release of BANano will have the possibility to use background workers in your WebApps. It can not be added in a BANanoLibrary, so it must be done in your final project. Background...

 

The next version of BANano (7) will have the ability to run Cron jobs!

A Cron is Timer like functionality that runs a certain job automatically at a specified time following a predifined...

 

BANanoRouter is a full blown Router with paths that will be standard included in the next release of BANano. It allows you to better organize your code in a PWA/SPA WebApp. It is based on the...

 

The "sentiment" feature in the example project, uses NLP document categorizer feature to find whether the text is negative or positive.
The dataset for the model contains movie...

 

Please start with this tutorial: https://www.b4x.com/android/forum/threads/nlp-sentiment-analysis.133922/
It is quite similar.

In this tutorial we will try to detect whether...

 

With the latest update for Windows 10 (version 1903), you can install a Linux distro as a Windows 10 Subsystem. This is very cool for us B4J developers as we can now very easily setup an...

 

When my assumptions are challenged I listen.
We all know Public variables and subs in a class are available to procedures external to the class.
But recently I learned from @LucaMs that...

 

Hello.
Namecheap.com is probably known to many as a domain provider. You can buy an interesting domain for our project for pennies. Some time ago I put my own small OpenMediaValue server on...

 

Add to B4XMainPage:

Type PagePosition (Left As Int, Top As Int, Width As Int, Height As Int, IsIconified As Boolean)
Private kvs As KeyValueStore

And:

Public Sub SavePagePosition (Page...

 

Upgrading from a non-tls connection to a tls connection only makes sense when dealing with a protocol that specifically requires it. It is much simpler and also a bit more secure to start with a...

 

I found this benchmark that tests the same algorithm in multiple programming languages and decided to test it in B4J.

I've implemented the two algorithms.

Sub Process_Globals

End Sub...

 

This example shows how simple it is to create network solutions with B4J, B4A and B4i.

In this case the network communication is based on UDP.

It implements a remote desktop mouse, where the...

 

Ola

I use a lot of parseInt and parseFloat when I code because even when I define the variables as Int, Double, Float etc, somewhere somehow mistakes happen, you find your app not working and...

 

I was making the switch from Java 8 to Java 11 and wanted to use the 'Integrated B4JPackager11' as explained by @Erel in...

 

Hi,

I had to make my application (PostChat) available on MacOs. I had no problems porting the app to Linux, but I found the port to MacOs very annoying, and had lots of issues. So I'm posting...

 

WYSIWYG Web Builder (https://www.wysiwygwebbuilder.com/) is a cheap Website builder that makes it very easy to make your design. @Alejandro Moyano mentioned it in his post on his...

 

For Mac
as already suggested by the good @KMatle

I needed to remove the Packager property (The B4J-packager does it on it's own with the new version)

Note 1*

'#PackagerProperty...

 

In B4XPages we rely heavily on tags to identify UI elements. Yet tags are valuable for connecting data to the UI, too, and it is easy to feel we are wasting tags for identification.
There is a...

 

Ola

I just spent some time nearly sweating as to why my app was not working properly. Turns out that my element names are not unique and as such a conflict arose.

Background...